|Song|Chinese|Hito Radio Top 10|9+2 Music Top 15|Global Asia Top 15|UFO Radio Top 15|Channel [V] Top 20|MTV Taiwan Top 20|YES 93.3 Top 20|
|---|---|---|---|---|---|---|---|---|
|Super Star||3|-|>4|3|4|-|14|
|Far Away|遠方|-|-|3|2|5|-|7|
|Half-Sugarism|半糖主義|3|-|-|7|-|3|-|
|River Shore Park|河濱公園|1|2|-|-|-|-|-|
|I.O.I.O||2|-|-|5|3|-|-|
|Heavy Rain|落大雨|1|-|-|-|-|>1|-|
|Smile of Summer|夏天的微笑|3|-|-|-|-|7|-|

Question: how many songs were on the mtv taiwan top 20 chart?
Answer: 3